My opinion? if you hatched a group of eggs and some looked OK while some appear to be crossed, better to get rid of the whole lot of them. You can't be sure that the birds you have will ever breed true. That is probably the case with the person you bought the eggs from. They may actually think they are breeding Barnevelder to barnevelder but reall one of their birds has been crossed somewhere along the way. Now the offspring produced are inconsistent, some "looking" true to breed while others look "way off", and sometimes the eggs are from the same birds. Part ofa purebred is the ability to breed true Everytime....jmo